Bichabd s



(No Model.) v

. R. S. WARING.

MANDREL FOR CABLE PRESSES.

No. 294,540., Patented Mar. 4, 1884.

t STATE PATENT @Frrcn.

RICHARD s. WARIN or rirrseune, PENNSYLVANIA.

MANDREL FOR CABLE-PRESSES.

SPECIFICATION formingpart of Letters Patent N0. 294,540, dated March 4,1884.

7 Application filed August 9,1883. (No model.)

T0 all whom it may concern: 7

Be it known that I, RICHARD S. WARING, acitizen of the United States,residing at Pittsburg, county of Allegheny and State of Pennsylvania,have invented or discovered a new and useful Improvement in MandrelsforGable-Presses; and I do hereby declare the fol-- tion being indicated bythe line 0: 00, Fig. 2;

and Fig. 4 is a transverse sectional view taken in the plane of the line00' m Fig.3.

My invention relates to mandrels for cablepresses designed for makingcables having a circular arrangement of wires; and,in general terms, itconsists of a tapering body of metal having wire-passages therethrough,such passages being arranged in groups in circular order around acentral group, with grooves extending longitudinally on the taperedsur-' face between groups of wire-passages terminating at the point ofthe mandrel in nipples or tubes, as hereinafter more fully described andclaimed.

In the drawings, A represents a tapering body, of iron, steel, or othersuitable metal, having at its larger end or base athreaded socket, a,for making attachment to the threaded end of the core-bar B of the ress,the tubular passage of which registers wi h the socket-chamber A in themandrel-body. Ex-

tending from chamber A to the point or smaller end of the mandrel-bodyare made a series of passages, a, which are arranged in differentgroups, one such group occupying the central or axial part of themandrel, and others composed of three passages, each occurring atintervals in circular order around the central group. On the exteriortapered surface of the mandrel-body, in lines between the groups ofpassages forming the outer circle, are made grooves 0. These groovesincrease in depth toward the point where they emerge A partially withinthe circle of the central group of passages. Their purpose is to providepassages for flow of lead past the outer groups of passages, or to thecable made thereby. The mandrel,at and near the point,is given alobedform by these grooves, (see Fig. 4,) each such lobe including orcarrying one of the three passage groups which together form the outeror surrounding circle. At the point of the mandrel the severalwire-passages a terminate in nipples ortubular extensions 6, whichare-formed by cutting grooves c in the metal between the separatepassages of each group, and also cut-ting channels or narrow passages 0across the end connecting the grooves c between the openings to theseparate passages. The inclosing-walls of the wire-passages are thusreduced to comparatively thin and light body; and to secure adequatestrength to withstand the pressure required in work, the channels c aremade shallow or of less depth-say about one-half the depth of thegrooves 0'. Greatest working pressure of leadupon the group, and bymaking the end channels, 0 shallow a web or body of metal is secured inthe center of each group,between its passages, which assists materiallyin sustaining the pressure of lead. Lead flowing along the grooves a,under pressure thereon, within the cylinder of the press,is applieddirectly to the outer surfaces of all the nipples contained in the outercircle of groups, and is also delivered or directed into the grooves 0and channels a between all the nipples or passages both in made forsecuring an adequate supply of lead between all the nipples, which,uniting around the nipples under pressure, passes off from each, formingcontinuous unbroken Walls of covering for each and all the wires of thecable. A i 1 So far as I am aware, it isnew with me to provide forgrouping wires in circular order in this class of cables. By means ofthis pro 'visionIam enabled to bring the wires: into close proximity inthe cable and secure the continuous unbrokenbody or walls of coveringrequisite to successful use for electrical purposes. These features ofconstruction and advantage are very useful in practice, becausenipple-surfaces is toward the center of each the inner and outer groups.Provision is thus passages to the inner parts of the mandrel- A itenables me to cover a large number of wires with a comparatively smallamount of lead, and also to combine the same into a single compoundcable of comparatively light weight and small sectional area.

It will be observed that the passages com posing the circle of thecentral groups correspond in number to the groups forming the ofpassages.

The cable maybe given any desired form of exterior, such form beingimparted to it, as heretofore practiced in the art, by the shape of thedieopening employed. I prefer a form in crosssection substantiallysimilar to the section of mandrel shown in' Fig. 4; but I make no claimherein to such a cable or to a cable of other form containing thepeculiar grouping of wires herein described, as the same will beincluded in the subject-matter of other applications. Also, in anotherapplication I have described and claimed a mandrel embracingsubstantially the features of construction contained in one of the outergroups of passages, and therefore I make no claim herein to the sameindividually considered, my present invention having reference moreparticularly to the features of construction by which I am enabled togroup a number of such parts or elements into one mandrel withsuccessful results in making compound cables therewith.

I claim herein as my invention- 1. A mandrel, A, for a cable-press,having groups of tubular nipples thereon,such groups being arranged incircular order around a central group, and having grooves c in its side,such grooves extending longitudinally between succcssive groups ofnipples, substantially as set. forth.

2. A mandrel, A, for a cable-press, having wire-passagestherethrough,terminating at the point in separate groups ofnipples,suchgroups being arranged in circular order around a central group, theouter eircle ofgroups being divided one from another bygrooves cutradially between them, such grooves being extended in depth at the pointof the mandrel to or within its cent .11 group of nipples, substantiallyas set forth.

3. A mandrel, A, having wire passages therethrough, such passagesterminating at the point in separate groups arranged in circular orderaround some central group, with grooves c, separating the groups of theouter circle, smaller grooves 0' between the individual 1 assages ofeach group,and channels 0 connecting the grooves 0 across the ends be'tween passages, substantially as set forth.

l. A mandrel for a cable-press, having passagesthcretihrough,terminatingat thepoint in separate tubular nipples, suchnipples being arranged in groups of three around some central group,with surface-grooves on the mandrel extending to its point between theouter groups of nipples, substantially as set forth.

5. A mandrel for a cable-press, having wirepassagestherethrough,terminatingatthepoint in separate groups of nipples, suchgroups being arranged i n circular order around and in the radial linesof the nipples of a cent 'al group, with surface-grooves on the mandrel,dividing the several outer groups one from another, and extending indepth within the circle of nipples of the inner group, substantially asset forth.

In testimony whereof I have hereunto set my hand.

RICHARD S. \VARING.

\Vitnesses:

R. H. XVIIIT'rImsEY, C. L. PARKER.

